REVIEWS AND BOOK NOTICES. 543 
of Messrs. Baird, Brewer and Ridgway, partly in courteous accom- 
modation of ourselves, in order that the names might become 
- available for our “ Check List,” then in press. Some twenty-five 
hew names are proposed all together, mostly varietal. 
Mr. Ridgway’s fourth and fifth papers are local lists of the Birds 
of, respectively, Colorado and the Salt Lake Valley. The first of 
these is a digest of the previous literature upon the subject, to- 
gether with the large amount of material gathered by, more par- 
ticularly, Mr. C. E. Aiken ; it comprehends the birds of the whole 
territory. The last named may be regarded as in some measures 
complementary to Mr. J. A. Allen’s recent ‘ Reconnoissance’ (Bull. 
Mus. Comp. Zool., iii, 1872), Mr Ridgway’s investigations having 
been conducted from May until August, while Mr. Allen’s were 
autumnal. The two together go very far towards completing our 
knowledge of the presence and movements of the species within 
the region mentioned. 
In evidence of the great activity of research at present in the 
southwest, may be instanced an additional local list by Mr. H. W. 
enshaw, giving a résumé of the ornithological results of his sea- 
Son’s connection with the Wheeler Explorations west of the 100th 
Meridian. The ground covered is partly what we went over in 
64-65, which has been latterly reworked by Lt. Bendire, U.S.A. 
The list is confined to Mr. Henshaw’s own observations, and ma 
be regarded as perfectly reliable, not only in the identifications of 
the Species, now contained in his beautiful collection, but in the 
observations upon their movements and relative frequency. 
Returning to Mr. Ridgway’s contributions to ornithology, we 
have next to note an important paper (Ann. Lye. N. Y. x, 1874, 
364) upon the birds of Illinois, with one exception the first article 
bearing upon the whole subject. Mr. R, H. Holder’s paper 
(Trans. Ill. Agric. Soc. iv, 1859-60, 605; 247 species, minus 
two not valid) was a simple enumeration, and, though excellent 
as far as it went, lacked the essential qualifications of discrim- 
Mating the several categories of residents, migrants and strag- 
lers. Kennicott’s contributions (op. cit., i, 580; 187 species) 
were confined to Cook county, and to a supplement of 22 species 
to Henry Pratten’s list of the Birds of Wayne and Edwards 
Counties (184 sp. + 22—206 ; op. cit., 596) with the addition of 
anhinga and Tantalus loculater (Pe. Bost. Soc. v, 1856, 391). 
With the exception of a paper which we have not seen, by F. 
